Cultivation methods of sweet potato

Planting time: sweet potato is sown from April to May in spring. Seed selection: choose a potato with a big head, no damage, more bud points and exuberant vitality. Cultivation: first soak the potato seeds in carbendazim solution for disinfection, then sow the seeds, pay attention to the distinction between the head and tail, otherwise affect the emergence of seedlings, you can choose oblique, the top covered with decaying wood can be covered with soil, such as sweet potato seedlings grow to 30-40cm for cutting, and then cutting. Fertilization: urea was mainly applied during the growth period, and strong fruit fertilizer was applied in the later stage.

First, planting time

Generally, sweet potato is sown in April-May every year, and the most suitable sowing time is in the middle of May, and the temperature in this period is about 15-20 ℃, which is helpful to improve the speed of sweet potato germination.

2. Selection of species

Sweet potato must be selected before planting high-quality potato species, this is conducive to increase production, should choose larger, no damage, have not been bitten by rats and insects, in addition, choose sweet potato sprouts more, vitality of potato species can be.

Third, sowing seeds

1. In order to avoid being bitten by mice before sowing, sweet potato seeds should be soaked in carbendazim solution for about 10 minutes, which can prevent the occurrence of some diseases and sow seeds after soaking.

2. When sowing, you must distinguish between the head and the tail, otherwise there will be no seedlings, and another way is to put it diagonally, and then cover it with a layer of decaying grass and rotten wood, and then cover up a thin layer of soil. If the temperature is low, you can cover it with a thin film. When the sweet potato seedlings grow to 30-40cm, you can prune, with three leaves in each section, and you can cut around 30cm according to the spacing of each plant.

IV. Rational fertilization

After the sweet potato seedlings are fixed and planted, in order to let the cutting seedlings grow new roots quickly, a mature fecal and urine water can be applied once. After the sweet potato seedlings survive, the growth situation will be different and looks very irregular. In order to speed up the seedlings, urea can be applied properly. In the later stage, in order to improve the growth rate of the plant, urea can be applied once and a small amount of compound fertilizer can be applied together. Finally, the strong fruit fertilizer is applied. Boron fertilizer and potash fertilizer can be increased.

5. Shunmiao

When the sweet potato seedlings grow to a certain stage, the sweet potato seedlings should be carried out in time, and the sweet potato vines in the field should be grown in the same direction, which is beneficial to the later harvest, and at the same time, some redundant branches and leaves can be removed in order to prevent nutrient loss.

VI. Prevention and control of diseases and insect pests

The main diseases and insect pests of sweet potato are leaf rollers, aphids, voles and grubs, aphids and leaf rollers mainly attack the leaves, thus affecting the normal photosynthesis of the leaves, which can be controlled by spraying trichlorfon solution, and the field mice are mainly harmful to the fruits of the field. the chemical control effect is not great, so it can be trapped and killed by mixing rat poison with the food that voles like to eat in the field.

VII. Harvest

Sweet potatoes are generally harvested from September to October, first all the sweet potato seedlings are removed, then the sweet potatoes can be dug out, and finally stored in the cellar, which can slow water loss and prevent decay.